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Volcano Watch: Kilauea activity update for April 7, 2016


Time-lapse thermal image movie of Halemaumau Overlook Vent. March 31-April 7, 2016. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Overlook Vent. March 31- April 7, 2016. Images courtesy of USGS/HVO


Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. March 31-April 7, 2016. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Crater looking Southwest. March 31-April 7, 2016. Images courtesy of Hawaii Volcanoes National Park


Time-lapse movie of Kīlauea Caldera from Hawaiian Volcano Observatory. March 31-April 7, 2016. Images courtesy of USGS/HVO

(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

Kīlauea continues to erupt at its summit and East Rift Zone. During the past week, the summit lava lake level varied between about 22 and 52 m (70–170 ft) below the vent rim within Halema‘uma‘u Crater. On the East Rift Zone, satellite imagery acquired on April 3 showed scattered lava flow activity within about 7.6 km (4.7 mi) of Puʻu ʻŌʻō. These flows were not threatening nearby communities.

Mauna Loa is not erupting. Seismicity remains elevated above long-term background levels, but no significant changes were recorded during the past week. GPS measurements show continued deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone of Mauna Loa, with inflation recently occurring mainly in the southwestern part of the magma storage complex.

Four earthquakes were reported felt in Hawaii this past week. On Tuesday, April 5, 2016, at 7:55 p.m., HST, a magnitude-3.4 earthquake occurred 23.0 km (14.3 mi) southeast of Waimea, Hawai‘i, at a depth of 23.7 km (14.7 mi), and at 2:19 a.m., HST, a magnitude-2.8 earthquake occurred 17.7 km (11.0 mi) southwest of Waimanalo, O‘ahu, at a depth of 18.9 km (11.7 mi). On Thursday, March 31, at 11:16 p.m., HST, a magnitude-4.7 earthquake occurred 83.6 km (51.9 mi) northeast of Honoka‘a, Hawai‘i, at a depth of 19.6 km (12.2 mi), and at 1:27 p.m., HST, a magnitude-3.0 earthquake occurred 11.6 km (7.2 mi) northwest of Honoka‘a, Hawai‘i, at a depth of 14.4 km (8.9 mi).


Time-lapse movie from images gathered from a temporary thermal camera looking into Pu’u ‘O’o Crater. The temperature scale is in degrees Celsius up to a maximum of 500 Celsius (932 Fahrenheit) for this camera model, and scales based on the maximum and minimum temperatures within the frame. Thick fume, image pixel size and other factors often result in image temperatures being lower than actual surface temperatures. March 31-April 7, 2016. Images courtesy of USGS/HVO


Time-lapse movie of Pu’u ‘O’o Crater North Flank from the North Rim. March 31-April 7, 2016. Images courtesy of USGS/HVO

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